<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>CryptoZombies front-end</title>
    <script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script language="javascript" type="text/javascript" src="web3.min.js"></script>
    <script language="javascript" type="text/javascript" src="cryptozombies_abi.js"></script>
  </head>
  <body>
    <div id="txStatus"></div>
    <div id="zombies"></div>

    <script>
      var cryptoZombies;
      var userAccount;

      function startApp() {
        var cryptoZombiesAddress = "YOUR_CONTRACT_ADDRESS";
        cryptoZombies = new web3js.eth.Contract(cryptoZombiesABI, cryptoZombiesAddress);

        var accountInterval = setInterval(function() {
          // Check if account has changed
          if (web3.eth.accounts[0] !== userAccount) {
            userAccount = web3.eth.accounts[0];
            // Call a function to update the UI with the new account
            getZombiesByOwner(userAccount)
            .then(displayZombies);
          }
        }, 100);

        // Start here
      }

      function displayZombies(ids) {
        $("#zombies").empty();
        for (id of ids) {
          // Look up zombie details from our contract. Returns a `zombie` object
          getZombieDetails(id)
          .then(function(zombie) {
            // Using ES6's "template literals" to inject variables into the HTML.
            // Append each one to our #zombies div
            $("#zombies").append(`<div class="zombie">
              <ul>
                <li>Name: ${zombie.name}</li>
                <li>DNA: ${zombie.dna}</li>
                <li>Level: ${zombie.level}</li>
                <li>Wins: ${zombie.winCount}</li>
                <li>Losses: ${zombie.lossCount}</li>
                <li>Ready Time: ${zombie.readyTime}</li>
              </ul>
            </div>`);
          });
        }
      }

      function createRandomZombie(name) {
        // This is going to take a while, so update the UI to let the user know
        // the transaction has been sent
        $("#txStatus").text("Creating new zombie on the blockchain. This may take a while...");
        // Send the tx to our contract:
        return cryptoZombies.methods.createRandomZombie(name)
        .send({ from: userAccount })
        .on("receipt", function(receipt) {
          $("#txStatus").text("Successfully created " + name + "!");
          // Transaction was accepted into the blockchain, let's redraw the UI
          getZombiesByOwner(userAccount).then(displayZombies);
        })
        .on("error", function(error) {
          // Do something to alert the user their transaction has failed
          $("#txStatus").text(error);
        });
      }

      function feedOnKitty(zombieId, kittyId) {
        $("#txStatus").text("Eating a kitty. This may take a while...");
        return cryptoZombies.methods.feedOnKitty(zombieId, kittyId)
        .send({ from: userAccount })
        .on("receipt", function(receipt) {
          $("#txStatus").text("Ate a kitty and spawned a new Zombie!");
          getZombiesByOwner(userAccount).then(displayZombies);
        })
        .on("error", function(error) {
          $("#txStatus").text(error);
        });
      }

      function levelUp(zombieId) {
        $("#txStatus").text("Leveling up your zombie...");
        return cryptoZombies.methods.levelUp(zombieId)
        .send({ from: userAccount, value: web3.utils.toWei("0.001", "ether") })
        .on("receipt", function(receipt) {
          $("#txStatus").text("Power overwhelming! Zombie successfully leveled up");
        })
        .on("error", function(error) {
          $("#txStatus").text(error);
        });
      }

      function getZombieDetails(id) {
        return cryptoZombies.methods.zombies(id).call()
      }

      function zombieToOwner(id) {
        return cryptoZombies.methods.zombieToOwner(id).call()
      }

      function getZombiesByOwner(owner) {
        return cryptoZombies.methods.getZombiesByOwner(owner).call()
      }

      window.addEventListener('load', function() {

        // Checking if Web3 has been injected by the browser (Mist/MetaMask)
        if (typeof web3 !== 'undefined') {
          // Use Mist/MetaMask's provider
          web3js = new Web3(web3.currentProvider);
        } else {
          // Handle the case where the user doesn't have Metamask installed
          // Probably show them a message prompting them to install Metamask
        }

        // Now you can start your app & access web3 freely:
        startApp()

      })
    </script>
  </body>
</html>
